Tech Tips

Tech Tips — June 2014

CE Professional Tech Tip Sharing
June 2014


**NOTICE**
Due the danger and complexity of electronics repair, the following shared
technical tips are intended for professional reference only. Please refer to
manufacturer’s recommendations as Encompass does not guarantee the accuracy,
reliability or safety of this information.
GE TV, Chassis TX81G
Reason for Service: 
Dead, no high voltage
Solution: Check all and
replace as necessary: CF09, DF04, DP18 and TP15.
Hitachi TV, 43FWX20B
Reason for Service: Horz noise in picture when first turned on.
Solution: Wiggle the anode
connector at each CRT to determine if this causes the symptom, if so, replace
that lead.
Panasonic PT-47WX53
Reason for Service: 
No audio
Solution: Check and replace
as necessary: R881, R880 and D2321.
Philips TV, 21PT6446-44, L03.1LAA
Reason for Service:  Vertical
is shrinking down.
Solution: Replaced D6460 SM diode in vertical section, and check or
replace C2444 and C2465.
RCA TV, ATC221
Reason for Service: Convergence not working
Solution: Convergence power
supply not working because FP251 and FP221 were open.  Replacing fixed the set.
RCA TV, ITC222
Reason for Service: Set pulses 3 times then goes into shutdown
Solution: Check the ground
straps on the CRTs.  Make sure they are
not touching anything shorting out.
Sony TV, KPCX35
Reason for Service: 
Bright picture with no contrast
Solution: Found C650 on the
G board open.  100uF/160V.
Sony TV, KV32FS120
Reason for Service: 
Dead, 9 blink error code
Solution: Replacing D647
fixed the set.  #10ERB20, NTE125
Toshiba TV, 34HD82
Reason for Service: Picture was jagged jittery and sometimes more than one
picture side by side.
Solution:  Found many bad caps on the vertical mounted MVPU15 board
assy.  Replacing them fixed the set.
Vizio Plasma, P50HDTV20A
Reason for Service: 
Shuts down

Solution: Replace all the
following in the power supply:  C201,202,203,227,271,272,282
and 283.  Check 261, C275.  Measure voltage in and out of all the
regulators on the main board.  Replace
any found bad.

Tech Tips — May 2014

CE Professional Tech Tip Sharing
May 2014
**NOTICE**
Due the danger and complexity of electronics repair, the following shared
technical tips are intended for professional reference only. Please refer to
manufacturer’s recommendations as Encompass does not guarantee the accuracy,
reliability or safety of this information.
Hitachi TV, 50V500A
Reason for service:  Negative or reddish picture
Solution: Cleaned
or replaced the connector between flex and drive PCB.
Hitachi TV, 50V500A
Reason for service: Bars
in picture or screen
Solution: Suspect
50 pin connector, #EK01182, polarity or improper connections.
Hitachi TV, 46UX12B
Reason for service:  Intermittently looses channels.
Fix:  Replace defective ZD-008 and C0062.
JVC TV, AF32F703
Reason for service: Shutdown.
Solution: Resoldered
W624 jumper and replaced the following: 
C973, 10uF/50V, D432, and Q431.
Mitsubishi TV, CK-3136R
Reason for service: Dead,
just clicks
Solution:  Replaced all the following:  C901, STR-S5141G, Caps, C914, 470uF/50V,
C916, 10uF/100V, C956, 2.2uF/200V, then discovered the Q532, HOT was
shorted.  Replaced it and a 3.15micro fuse
and the set was fixed.
Panasonic TV, CT-36HX41E
Reason for service:  Intermittent shutdown
Solution: Replaced
R517 and C524.
Panasonic TV, TH42PX75U
Reason for service:  Video is intermittent on all inputs
after set is on for a while.  Audio, OK.
Solution: Clean
and reseat the LVDS cable between the main and control/logic boards.
RCA TV, ITC222
Reason for service:  Set chirps 3 times and shuts down.  No high voltage.
Solution: Flyback
LI008 bad.  If drawing number on fly is
107 56 Xxx, use 259296.  Otherwise use
265409.  Also replace TI-010, 2SC2588 and
DI-012, BYW34V, (244834) 
Sharp TV,  25RT59
Reason for service:  Jagged edges, Christmas tree effect.
Solution: Test
by installing a jumper from the cap at bridge diode output to the cathode of
125V SCR.  Bring set up on a variac.  If the jagged edges go away, replace IC701.   RH-IZ0073CEZZ
Sony TV, KVTS20
Reason for service: Black
screen but sound OK

Solution: Bringing
up screen you could see vertical collapsed. Found and repaired bad connections
on IC501 and the yoke plug.